glamor: pixmap FBO may not be allocated
If `_glamor_create_tex()` fails to allocate the FBO because of
GL_OUT_OF_MEMORY error, the `pixmap_priv->fbo` is NULL.
However, `glamor_get_pixmap_texture()` doesn't actually check whether
the `pixmap_priv->fbo` is NULL and will segfault with a NULL pointer
dereference trying to access the `pixmap_priv->fbo->tex`.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Closes: https://gitlab.freedesktop.org/xorg/xserver/issues/647
(Cherry picked from commit 74479a99ec
)
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@ -136,6 +136,9 @@ glamor_get_pixmap_texture(PixmapPtr pixmap)
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if (!pixmap_priv)
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return 0;
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if (!pixmap_priv->fbo)
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return 0;
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if (pixmap_priv->type != GLAMOR_TEXTURE_ONLY)
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return 0;
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